Despite having just given birth, Duchess Catherine looked flawless in a red dress with a white collar (almost identical to the dress Princess Diana wore after giving birth to Prince Harry) by Jenny Packham. Her go-to stylist, Natasha Archer, was presumably behind the ensemble as she was spotted leaving the prestigious hospital just one hour before the royal gave birth.

Meanwhile, the new royal baby was swaddled in a cream blanket and matching knitted hat -- both which will no doubt sell out in a matter of minutes. He appeared calm (and awfully sleepy!) as he was presented to the waiting media and crowds of well-wishers who had gathered outside the hospital to catch a glimpse of the new family.

The royal couple then disappeared into the hospital where they transferred their new arrival into a car seat. They then reemerged ready to make their way home to Kensington Palace.

Prince William took to the driver's seat while the new mum sat in the backseat with her precious bundle of joy.

The new-mum-of-three was sure to keep her youngest bundled in the chilly weather, even stopping to adjust his swaddle from time to time.

There he is! The royal couple are expected to announce the new arrival's name imminently.

Kate, 36, and Wills, 35, were happy to pose for photographs with their little one but politely declined to answer any questions.

After disappearing into the hospital once again for a few minutes, the royal couple emerged with the new royal baby strapped safely into a car seat ready for the short journey home.

William took to the driver's seat of a waiting car while Kate sat in the backseat with her precious new bundle of joy.

He's heading home!

Kensington Palace first confirmed the 36-year-old royal was in labour Twitter at 08:23am in the morning, London time via Twitter in a statement which read: "Her Royal Highness The Duchess of Cambridge was admitted to St. Mary's Hospital, Paddington, London earlier this morning in the early stages of labour."

"The Duchess travelled by car from Kensington Palace to the Lindo Wing at St. Mary's Hospital with The Duke of Cambridge."

Royals, fans and celebrities have been quick to share their congratulations to Prince William and Duchess Catherine for their new son.Kensington Palace shared, "The Queen, The Duke of Edinburgh, The Prince of Wales, The Duchess of Cornwall, Prince Harry and members of both families have been informed and are delighted with the news."

Kate and William's third child will now be the fifth in line to the British Throne, bumping Uncle Harry to number six.

The arrival of Prince William and Duchess Catherine's third child marks a huge break with tradition for the Royal Family.

The Cambridges are the first senior royal couple since The Queen and Prince Philip to not have two children, with Prince Charles, Princess Anne, Prince Andrew and Prince Edward all having two kids.

Would you have a look at that little button nose?!

And those tiny fingers?!

The third child of Prince William and Duchess Catherine bumps Harry down to the sixth place in the succession line and they are in position number five.

A huge congratulations to Prince William and Duchess Catherine on their beautiful baby!